enable diagnostics on tests, others

Author: StephaneDelcroix

docs/design/FeatureSwitches.md

@@ -14,6 +14,8 @@ The following switches are toggled for applications running on Mono for `TrimMod
 | MauiEnableXamlCBindingWithSourceCompilation | Microsoft.Maui.RuntimeFeature.XamlCBindingWithSourceCompilationEnabled | When enabled, MAUI will compile all bindings, including those where the `Source` property is used. |
 | MauiHybridWebViewSupported | Microsoft.Maui.RuntimeFeature.IsHybridWebViewSupported | Enables HybridWebView, which makes use of dynamic System.Text.Json serialization features |
 | MauiNamescopesSupported | Microsoft.Maui.RuntimeFeature.AreNamescopesSupported | Enable support for Namescopes, FindByName if the application uses it, or to keep supporting runtime and XamlC XAML inflators |
+| EnableDiagnostics | Microsoft.Maui.RuntimeFeature.EnableDiagnostics | Enables diagnostic for the running app |
+| EnableMauiDiagnostics | Microsoft.Maui.RuntimeFeature.EnableMauiDiagnostics | Enables MAUI specific diagnostics, like VisualDiagnostics and BindingDiagnostics. Defaults to EnableDiagnostics |
 
 ## MauiEnableIVisualAssemblyScanning
 

src/Controls/tests/Core.UnitTests/BindingUnitTests.cs

@@ -20,6 +20,30 @@ namespace Microsoft.Maui.Controls.Core.UnitTests
 	public class BindingUnitTests
 		: BindingBaseUnitTests
 	{
+		bool enableDiagnosticsInitialState;
+		public BindingUnitTests()
+		{
+			enableDiagnosticsInitialState = RuntimeFeature.EnableDiagnostics;
+			RuntimeFeature.EnableMauiDiagnostics = true;
+		}
+
+		bool _disposed;
+
+		protected virtual void Dispose(bool disposing)
+		{
+			if (_disposed)
+			{
+				return;
+			}
+
+			if (disposing)
+			{
+				RuntimeFeature.EnableMauiDiagnostics = enableDiagnosticsInitialState;
+			}
+
+			_disposed = true;
+		}
+
 		protected override BindingBase CreateBinding(BindingMode mode = BindingMode.Default, string stringFormat = null)
 		{
 			return new Binding("Text", mode, stringFormat: stringFormat);

src/Core/src/RuntimeFeature.cs

@@ -14,7 +14,7 @@ namespace Microsoft.Maui
 	/// </remarks>
 	static class RuntimeFeature
 	{
-		const string FeatureSwitchPrefix = "Microsoft.Maui.RuntimeFeature.";
+		const string FeatureSwitchPrefix = "Microsoft.Maui.RuntimeFeature";
 
 		const bool IsIVisualAssemblyScanningEnabledByDefault = false;
 		const bool IsShellSearchResultsRendererDisplayMemberNameSupportedByDefault = true;